DP83255AVF datasheet(60/96 Pages) NSC

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60 Pin Descriptions (Continued)

PHY PORT INTERFACE

The PHY Port Interface consists of IO signals used to connect the PLAYER Device to the Media Access Control (MAC)

sublayer or other PLAYER Devices The DP83251 Device has one PHY Port Interface which consists of the B

Request and the

Indicate paths

Each path consists of an odd parity bit a control bit and two 4-bit symbols

Refer to Section 33 the Configuration Switch for further information

Symbol

Pin No

Description

AIP

PHY Port A Indicate Parity

A TTL output signal representing odd parity for the 10-bit

wide Port A Indicate signals (AIP AIC and AIDk70l)

AIC

PHY Port A Indicate Control

A TTL output signal indicating that the two 4-bit symbols

(AIDk74l and AIDk30l) are either control symbols (AIC e 1) or data symbols (AIC

AID7

PHY Port A Indicate Data

TTL output signals representing the first 4-bit datacontrol

symbol

AID6

AID5

AID7 is the most significant bit and AID4 is the least significant bit of the first symbol

AID4

AID3

PHY Port A Indicate Data

TTL output signals representing the second 4-bit data

control symbol

AID2

AID1

AID3 is the most significant bit and AID0 is the least significant bit of the second symbol

AID0

BRP

PHY Port B Request Parity

A TTL input signal representing odd parity for the 10-bit

wide Port A Request signals (BRP BRC and BRDk70l)

BRC

PHY Port B Request Control

A TTL input signal indicating that the two 4-bit symbols

(BRDk74l) and BRDk30l) are either control symbols (BRC e 1) or data symbols

(BRC e 0)

BRD7

PHY Port B Request Data

TTL input signals representing the first 4 bit datacontrol

symbol

BRD6

BRD5

BRD7 is the most significant bit and BRD4 is the least significant bit of the first symbol

BRD4

BRD3

PHY Port B Request Data

TTL input signals representing the second 4-bit datacontrol

symbol

BRD2

BRD1

BRD3 is the most significant bit and BRD0 is the least significant bit of the second

symbol

BRD0

DP83255AVF Datasheet(PDF) 60 Page - National Semiconductor (TI)

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